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Accumulated plastic strain

Ovality 10 3.5 8" 219.1mm pipe 8" 219.1mm pipe 9 12" 323.9mm pipe 12" 323.9mm pipe 3.0 16" 406.4mm pipe

Pipelines 16" 406.4mm pipe 8 2.5 7 6 2.0 5 1.5

Ovality (%) 4 3 1.0 2

Accumulated plastic strain (%) 0.5 1 0 0.0

Deep Deep Apache Amazon Seven Falcon Navica

Seven Falcon Apache Amazon Deep Deep Apache Amazon Seven Deep Seven Falcon Apache Amazon Deep Apache Amazon Seven Deep Deep Deep Deep Deep Apache Amazon Seven Falcon Navica Deep Deep Apache Amazon Seven Falcon Navica Falcon Navica Navica Falcon Navica Navica

Energy Blue II Oceans

Energy Blue II Oceans

Because these steps are similar, the during the cycle. The strain magnitude The existing vessels were all com-

Amazon can be compared to other ves- depends on the number of, and diam- pared using their respective wheel/reel sels in the current ? eet, in terms of how eters of, the forming equipment items diameters and aligner wheel diameters. much strain and ovality is put into the involved. Classical and ? rst principle formulas pipe by the installation vessels. These strain steps also occur in reel- were used in order to ensure the com-

The Amazon’s deck aligner wheel and ing vessels, forming onto the reel (O-A), parison was on equal footing. tower aligner wheel are identical, with unreeling to the tower aligner wheel Calculations show that for the three an 18m diameter, equal to the reel of (A-B), passing over the aligner (B-C), pipe sizes considered, the three Technip the Seven Oceans and greater than most passing into the straightener (C-D), and vessels (Deep Energy, Deep Blue and other pipelay systems. being straightened (D-E). Apache II) generate the lowest accu- mulated plastic strain, and that the

Amazon and Seven Oceans return identical results, almost matching that

Petrofac takes on pipelay of the Apache II. The Falcon, Seven

Navica and remaining vessels, produce

London-listed service provider long-lead orders for the vessel, progressively larger accumulated plastic

Petrofac has unveiled a new design which it says will be available strains, due to the smaller reel/aligner for a deepwater derrick lay vessel, for construction and installation diameters.

to be built at the Shanghai Zhenhua activities in early 2017.

The ovalisation experienced by the

Heavy Industry Co., Ltd (ZPMC) yard The vessel will be DP3, have a

Navica and Falcon borders the industry in China. service speed of 12kn, six 8,500kW accepted 3% for the largest pipe size con-

The 215m-long, 49m-beam unit generators, eight-point mooring sidered of 16.” The Amazon and Seven

Oceans match closely with the Apache II, will be based on a customized capability, ice-class Finnish Swedish and all three produce ovality levels close

ULSTEIN SOC 5000 design, 1C, and be able to accommodate to the industry leaders Deep Energy and developed by Ulstein Sea of 399 people.

Deep Blue.

Solutions, a Netherlands-based Kongsberg Maritime, Norway, subsidiary of Ulstein. is supplying electrical and control

Vibor Paravic is

The vessel has a combination systems. National Oilwell Varco,

Vice President of a 600-tonne Remacut S-lay USA, will provide a 5000-tonne

Technology at system via a center ? ring line below revolving main crane and four deck

Ceona. He has more than 20 years’ main deck, and a 2000-tonne IHC cranes. engineering experi-

Engineering Business J-lay system Remazel Engineering, Italy, will ence. He has been via a moonpool, supply two deepwater 750-tonne involved in all “This double deck con? guration, a winches, and Remacut, Italy, aspects of subsea distinctive feature in Ulstein Sea of will supply the 600-tonne S-lay engineering including detail design,

Solutions designs, allows for a large, tensioners and pipe handling subsea construction, and pipelay, unobstructed deck area and below equipment. Classi? cation will be covering projects globally. He has an

MSc in Mechanical Engineering from deck pipe fabrication,” Ulstein says.

provided by Lloyds Register Group • the University of Houston.

Petrofac has placed the ? rst –Elaine Maslin

March 2014 | OE oedigital.com 62 000_OE0314Pipelines2.indd 62 2/21/14 1:04 PM